JP2000276905A - LED light source vehicle lighting - Google Patents

Abstract

(57) [Problem] In a vehicle lamp using a conventional LED lamp as a light source, since a rotating paraboloid is used for a reflecting mirror, it is difficult to control reflected light when sunlight enters. There is a problem that pseudo lighting is easily generated and visibility during daytime is inferior. According to the present invention, a reflector 2 has an inner surface of a cone shaped so that an opening 2a has a substantially rectangular shape in a state where an LED light source vehicle lamp 1 is viewed from the front in an irradiation direction. The LED light source vehicle lamp 1 includes the first reflecting surface 21 and the flat second reflecting surface 22 extending substantially parallel to the irradiation direction from one side of the opening 2a. In the cross section along the central axis Z of the LED lamp 3, all reflecting surfaces appear as straight lines, and it is assumed that the direction of reflected light that the incident sunlight exits again from the LED light source vehicle lamp can be easily controlled. Solve the problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which a plurality of LED lamps are used as a light source, such as a stop lamp for signal use.

[0002]

2. Description of the Related Art A conventional LED light source vehicle lamp 9 of this kind.
FIG. 4 shows an example of the configuration of the housing 91.
, And a suitably shaped wiring board 92
Has a plurality of LED lamps 93 in a matrix or the like.
Is installed. For each of the LED lamps 93, a reflecting mirror 94 having a paraboloid of revolution or the like having a light source of the LED lamp 93 as a focal point is provided. An outer lens 95 provided with 95a is provided.

[0003] By configuring the LED light source vehicle lamp 90 in this manner, part of the light emitted from the LED lamp 93 directly reaches the outer lens 95, and part of the light is reflected by the reflecting mirror 94 and then reflected by the outer mirror 95. The light reaches the lens 95, and both lights are appropriately diffused by the lens cut 95a, so that a light distribution characteristic suitable for use as, for example, a stop lamp is obtained.

[0004]

However, in the above-mentioned conventional configuration, the reflecting mirror 94 may employ a surface such as a paraboloid of revolution whose curvature changes in a cross section along the axis of rotation. Light is an LED light source vehicle lamp 9
When the light is irradiated to 0, reflection is repeated in the reflecting mirror 94, and as a result, the entire surface of the reflecting mirror 94 shines,
It is easy to cause pseudo-lighting as if the LED lamp 93 is lit, causing a problem that visibility during daytime is impaired.

[0005]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, an LED light source vehicle lamp comprising a plurality of LED lamps each having a reflecting mirror as a light source. In the above, the reflecting mirror is a first reflecting surface having a conical inner surface formed so that the shape of the opening is substantially rectangular when the LED light source vehicle lamp is viewed from the front in the irradiation direction side. And an LED light source vehicle lamp characterized by comprising a planar second reflecting surface extending substantially parallel to the irradiation direction from one side of the opening. It is.

[0006]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 and FIG.
The LED light source vehicle lighting device according to the present invention is indicated by the symbol.
This is the same as that of the conventional example in that a plurality of LED lamps 3 having

[0007] Here, the LED light source vehicle lamp 1 of the present invention.
Then, the configuration of the reflecting mirror 2 is devised.
First, the reflection mirror 2 when viewed from the front on the irradiation direction side
The opening 2a has a substantially rectangular shape as shown in FIG. Therefore, when the light emitting surface of the LED light source vehicle lamp 1 is formed by assembling the substantially rectangular openings 2a as described above, no gap is formed between the openings 2a. Can be.

FIG. 2 is a sectional view of the reflecting mirror 2 taken along a center line passing through the LED lamp 3. The reflecting mirror 2 includes a first reflecting surface 21 and a second reflecting surface 22. The first reflection surface 21 is formed as a conical inner surface as a basic shape. Therefore, in the cross section along the central axis Z of the LED lamp 3 shown in FIG. 2, the first reflecting surface 21 has a straight line.

As described above, the entire reflecting surface 2 has a substantially rectangular shape when the opening 2a is viewed from the front, so that the outer periphery of the first reflecting surface 21 is substantially rectangular. Therefore, the formed shape is a shape obtained by combining a hollow prism and a hollow cone, and in the cross section in FIG. 2, the outer end of the surface forming the conical surface is formed. Is the central axis Z of the LED lamp 3.
And a straight line part parallel to.

Further, in the present invention, the second reflecting surface 22 is formed as a flat surface, and the position where the second reflecting surface 22 is provided extends along a substantially rectangular side of the first reflecting surface 21. It is provided as a state. In this embodiment, the LED light source vehicle lamp 1 is provided on the lower side in a state of being attached to the vehicle body, and the direction in which the second reflection surface 22 extends is parallel to the center axis Z. I have.

In the present embodiment, the accommodating opening 23 of the LED lamp 3 is formed such that the vertex of the first reflecting surface 21 having a conical shape is cut at a plane perpendicular to the central axis of the LED lamp 3. I have. By forming the storage opening 23 in this way, the peripheral edge of the storage opening 23 is formed at an acute angle as shown in the cross section of FIG. As a result, the light amount of the LED lamp 3 can be efficiently secured.

The reference numeral 4 in the drawing denotes an outer lens. The outer lens 4 has a shape set in consideration of the shape of the reflecting mirror 2 or the design of the vehicle body. If necessary, a lens cut 4a is provided on the inner surface corresponding to the reflection mirror 2, and LE
The final light distribution characteristics of the D light source vehicle lamp 1 are set.

A housing denoted by reference numeral 5 in the drawing is a housing. The housing 5 and the outer lens 4 constitute a lamp chamber for accommodating the reflector 2, the LED lamp 3 and the like, and the LED 5 It also holds a board or the like on which the lamp 3 is mounted, and furthermore, the LED light source vehicle lamp 1
There is also provided a structure for attaching the to a vehicle body (not shown).

FIG. 3 shows the operation of the LED light source vehicle lamp 1 of the present invention having the above-described configuration. As described above, the first reflecting surface 21 of the reflecting mirror 2 is formed as an inner surface of a cone (concave cone). As a result, the cross section along the central axis Z of the LED lamp 3 (the figure shows a vertical cross section in a state of being mounted on a vehicle) includes the second reflection surface 22 and all the straight lines appear. Becomes

[0015] This is because when the sunlight irradiates the reflecting mirror 2, a curve does not appear in the above-mentioned cross section as in a conventional paraboloid of revolution, for example, so that the reflecting mirror 2 is irradiated at a fixed incident angle. There is no complicated element in the analysis such as generation of reflected light at various angles with respect to sunlight, and it is extremely easy to grasp the situation occurring in the reflecting mirror 2.

Therefore, for example, the reflected light of the sunlight reaching the second reflecting surface 22 is reflected by the first reflecting surface 21 and passes through the outer lens 4 and again to the outside of the LED light source vehicle lamp 1. When the light is emitted, the size of the opening angle α of the first reflection surface 21 or the length L of the second reflection surface 22 is set so that the light is reflected within the range of the light distribution characteristics. For example, the degree of false lighting of the following vehicle is significantly reduced.

At this time, the opening angle α of the first reflecting surface 21 may be asymmetrical in the vertical direction with respect to the center axis Z of the LED lamp 3, that is, in other words, The elevation may be provided with respect to the center axis Z, or the inclination may be provided. Further, the cone and the prism are eccentric in the vertical direction. Is also good.

Further, the second reflection surface 22 is formed of the LED.
By being a plane mirror substantially parallel to the central axis Z of the lamp 3,
When the LED lamp 3 is turned on, an image 3 'of the LED lamp 3 is generated, and the number of light sources on the back surface of the outer lens 4 is felt to be doubled, the appearance is improved, and the luminance unevenness on the surface of the outer lens 4 is improved. Is also reduced.

As a result of trial production and examination by the inventor for realizing the present invention, it was found that the LE having the solar light of the present invention was constructed.
The D light source illuminates the outer lens 4 surface of the vehicular lamp 1 and the LED lamp 3 is viewed from a range of 50 degrees upward from the front.
Was turned on and off, and the luminance ratio of both was measured. As a result, it was confirmed that a luminance ratio of 3 times or more was obtained in any state.

[0020]

As described above, according to the present invention, the reflecting mirror is shaped such that the shape of the opening is substantially rectangular when the LED light source vehicle lamp is viewed from the front in the irradiation direction. The LED light source vehicle lighting device includes an inner first reflective surface and a planar second reflective surface extending substantially parallel to the irradiation direction from one side of the opening. . First, in the cross section along the central axis of the LED lamp, it is assumed that all the reflecting surfaces appear as straight lines, and it is easy to control the direction of the reflected light that the incident sunlight emits again from the LED light source vehicle lamp. What can be done is to reduce the degree to which the reflected light reaches the viewer and cause false lighting, thereby achieving an extremely excellent effect of improving the visibility of this type of vehicle lamp in the daytime.

At the same time, when the LED lamp is turned on by the planar second reflecting surface, the LED is applied to the second reflecting surface.
As a result of the lamp mapping, the viewer sees that the number of LED lamps has doubled, reduces the occurrence of luminance unevenness, etc., and improves the aesthetic appearance. Lighting is clearly recognized, and an excellent effect of further improving visibility is achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing an essential part of an embodiment of an LED light source vehicle lamp according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view showing an operation of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... LED light source vehicle lamp 2 ... Reflection mirror 2a ... Opening 21 ... First reflection surface 22 ... Second reflection surface 23 ... Storage opening 3 ... LED lamp 4 ... Outer lens 4a …… Lens cut 5 …… Housing Z …… Center axis of LED lamp α …… Open angle of the first reflection surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Kaneda 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Pref. Nissan Motor Co., Ltd. (72) Inventor Hitoshi Nakagaki 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan F Terms (reference) 3K080 AA01 AB01 BA04 BA07 BC02

Claims (1)

[Claims] 1. A plurality of LEDs, each having a reflector.
In an LED light source vehicle lamp in which a lamp is adopted as a light source, the reflecting mirror is formed such that the shape of the opening is substantially rectangular when the LED light source vehicle lamp is viewed from the front in the irradiation direction. An LED light source comprising: a first reflecting surface having an inner surface of a conical shape; and a second reflecting surface having a planar shape extending from one side of the opening so as to be substantially parallel to an irradiation direction. Vehicle lighting fixtures.